Shuttle for sewing-machines.



E. ERICKSON.

SHUTTLE FOR SEWING MACHINES.

APPLICATION FILED JULY 17, 1914.

1,149,349. Patented Aug. 10, 1915.

mbwsses" 66 6 Inventor:

zfls Flg. I Edw @E W5 67//& 70 n0 EDWARD ERICKSON, or LYNN, MASSACHUSETTS, Assienon .TO VICTOR SHOE MACHINERY 00., OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

SHUTTLE FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Aug. 10, 1915.

Original applicationfiled December 28, 1912. Serial No. 739,056. Divided and this application filed July 17,

1 '0 all whom it may concern.

Be it known that I, EDwAnnEnIoKsoN, a subject of the King of Sweden, and a resident of Lynn, inthe county of Essex and State of lllassachusetts, have invented certain new and useful Improvements in Shuttles for Sewing-Machines, of which the following is a specification.

This invention relates to machines for sewing heavy material such as leather, and refers particularly to that type of such Inachines known as welt sewing machines.

The object of the invention is to provide an improved shuttle and carrier therefor in a machine such as is shown in another application of mine filed December 28, 1912, Ser. No. 739,056, of which this application is a division, said original application having matured into Patent No. 1,137,198, dated April 27, 1915.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a plan view of a machine embodying the principles of the present invention. Fig. 2 represents a detail elevation of the shuttle and its support. Fig. 3 represents a section on line 3-8 of Fig. 2. Fig. 4 represents a View similar to Fig. 3, but showing the bobbin support turned outwardly. sens a section on line 55 of Fig. 2 on an enlarged scale, and Fig. 6 represents a section on line 6-6 of Fig. 5, and also on line 99 of Fig. 2, but on a larger scale than Fig. 2.

Similar characters designate like parts throughout the several figures of the drawings.

The base of the machine is provided with two uprights or standards 31, 32. The main shaft 3% is supported in a bearing 35 in the standard 31 and in a bearing 36 carried by a bracket, which is bolted to the side of the standard 32. Saidmain shaft has a driving pulley (not shown) at one end and at its other end is provided with a spiral gear 39 meshing with a pinion 10 secured to a shaft 41 mounted in a bracket l2 supported by the top of the standard 31. The gear 39 and pinion 40 are as 3 to 1. The opposite ends of the shaft 11 are provided with" cranks 43, 4.4 substantially at an angle of Fig. repre- Serial No. 852,098.

:90 to each other. A shaft 45 also mounted in the bracket is provided with cranks 16, t7 at substantially an angle of 90 to each other. cranks 48 and 46, and a pitman' e9 connects the cranks 4:4 .and 17. The pitinan 49 has an extension or finger 50, the extreme tip of which forms or carries a lateral pin 51 which enters a recess 52 in the shuttle-53. The connections just described, including the parallel links 48, 49, impart asmooth, uniform motion to the shuttle to rotate the latter three times to each rotation of the main shaft. 2 1

Referring especially to Figs. 2, 3 and 4, it will be seen that the shuttle 53 is provided with a rib 5-1- running in a groove formed in the two-part bearing bracket 55, 56, these two parts of the bearing bracket being formed to present a circular support for the shuttle, one side of the support being open ofcourse to permit the loop of needle thread to be engaged by the hook 9 of the shuttle, carried around the shuttle and removed again therefrom by thetakeup. As shown in Figs. 1 and 2, a screw 57 connects the two parts 55, 56 of the shuttle supporting bracket together, attaching bolts 58 securing the two parts of the bearing bracket to the inner face of the standard 31.

As best shown in Fig. 1,'all of the parts so far described are arranged and mounted to present the shuttle in a plane tangential to the plane of operation of the needle and awl.

The bobbin-59 (Figs. 2, 3 and 4) is rotatably supported upona pin 60 projecting from an arm61 pivoted at 62 to the shuttle, said arm 61 having a heel or lateral pro jection 63, by means of which, as presently described, the bobbin and its support may be locked in the position shown in Fig. 3. A spring 64 secured at one end to the shuttlesupporting bracket bears atits other end against the bobbin to hold the'bobbin on the pin '60 and also to provide tension to prevent too free unwinding motion of the bobbin. The heel 63 isprovide'd with a pin 65 having a fiat side and a round side, asshown in Figs. 5a'nd 6, said pin 65 being adapted to enter the recess 67 of the latch bolt 66, which is mounted in the shuttle body, a projection68 at one side of the recess 67 forming a keeper to engage the pin 65 when in the position shown in Fig. 6,

A pitman 18' connects the I and consequently lock the bobbin arm 61 in the position shown in Fig. 3. The engagement of the keeper 68 with the pin 65 is preserved by a spring 69 confined between the inner end of the latch bolt 66 and the plug 70 threaded into the inner end of the aperture for bolt 66. Whenever it is desired to remove the bobbin for rewinding or to substitute another bobbin for it, pressure against the end of the latch bolt 66 by any suitable implement disengages the keeper 68 from the pin 65 so that the operator, by pushing with one finger against the side of the bobbin which sustains the pressure of spring 64, may swing the bobbin and its support to the position shown in Fig. & so that the bobbin can easily be removed from the pin 60. By then simply swinging the support 61 from the position shown in Fig. 4 back to the position shown in Fig. 3, the round side of the pin 65, when it contacts with the keeper 68, acts as a cam to displace the keeper 68 to permit the pin 65 to pass it, after which the spring 69 causes the latch bolt 66 to return to the position shown in Fig. 6.

As the mechanism for operating the needle and awl form no part of the present-invention, these mechanisms are not herein described. These operating mechanisms are fully described in the application 739,056, to which reference may be made for a more complete description.

The machine is also provided with suitable work feeding devices by which the work may be fed by the awl but it is be lieved that no description thereof is required in View of the fact that this mechanism vention.

The looper, the loop spreader 216, the,

needle guide, and the other instrumentalities for forming the stitch, are all fully described in'said application 739,056, and are not therefore shown and described in this application.

The shuttle herein shown and described is simple in construction and effective in operation. It is believed that its operation and many advantages will be fully understood Without further'description.

- Having thus described my invention, I claim:

1. In a sewing machine, the combination of a rotary shuttle having a bobbin chamher; a pivoted arm mounted on and movable with said shuttle and having a lateral bobbin support normally positioned within said chamber with its axis coincident with the axis of said chamber, said arm having a heel; and means releasably engaging said heel for positively locking the pivoted arm.

Copies of this patent may be obtained for forms no part of the present in- 2. In a sewing machine, the combination of a rotary shuttle having a bobbin chamher; a pivoted arm having a bobbin support movable to and from said chamber, said arm having a heel; means releasably engaging said heel for positively locking the pivoted arm; a bracket supporting said shuttle; and a spring secured to said bracket and adapted to bear against the center of the side of the bobbin opposite said arm.

3. In a sewing machine, the combination of a rotary shuttle having a bobbin chamber; an arm pivoted to the shuttle and having a bobbin support movable to and from said chamber, said arm havinga heel provided with a pin extending laterally there from; and a spring bolt adapted to engage the pin of said heel and lock said arm from movement about .its pivot. 7

&1 In a sewing machine, the combination of a rotary shuttle having a bobbin chamber; an arm pivoted to the shuttle and having a bobbin support movable to and from said chamber, said arm having a heel provided with a pin extending laterally therefrom; and a spring bolt adapted to engage the pin of said heel and lock said arm from movement about its pivot, one end ofthe bolt being exposed for manual operation to release the pin and permit said pivoted arm to be moved outwardly about its pivot.

5. In a sewing machine, the combination of a rotary shuttle having a bobbin chamber; a pivoted arm mounted on and revoluble with said shuttle and having a lateral bobbin support adapted to be positioned in the center of said chamber and provided with an inwardly projecting heel; a pin on said heel; and a spring pressed bolt having a shouldered notch therein adapted to coact with said pin to lock said arm.

6. In a sewing machine, the combination of a rotary shuttle having a bobbin chamber; a pivoted arm mounted on and revoluble with said shuttle and having a lateral bobbin support adapted to be positioned in the center of said chamber and provided with an inwardly projecting heel; a pin on said heel; a nonrevoluble member slidably mounted ina transverse opening in-said shuttle and having a recess inone face to receive said pin and a projection to normally retain said pin in said recess; and a spring coacting with said. slidable member to retain said projection in the path of said Signed by me at Boston, Mass, this 18th day of June, 1914.

, EDWARD ERICKSON. Witnesses:

EDWARD F. ALLEN, WALTER E. LOMBARD.

Washington, D. C. 

